Voyages
The cruise lines I know and book, by the way they travel.

Ocean Voyages
Larger ships with room to roam, for long passages and many ports.

River Voyages
Slow water through the middle of a country, with a town at most bends.

Yacht Voyages
Small ships that slip into harbours the big ones pass by.

Expedition Voyages
Ice, remote coast and wildlife, with naturalists and landings by Zodiac.
Every line on the site
Aqua Expeditions (expedition, river): Aqua Expeditions was founded in 2007 in the Peruvian Amazon by Francesco Galli Zugaro and has grown into a fleet of six small ships, each with one crew member for every guest.
Aurora Expeditions (expedition): Aurora Expeditions was founded in 1991 by Greg and Margaret Mortimer and takes its name from the Aurora, the ship of Antarctic explorer Sir Douglas Mawson.
Crystal (ocean): Crystal changed hands in 2022, and its two ocean ships returned to sea in July 2023 after a refit in Trieste that cut capacity from 980 to 740 guests on Crystal Serenity and from 848 to 606 on Crystal Symphony, all in ocean-view rooms and suites.
Four Seasons Yachts (yacht): Four Seasons I set sail on March 20, 2026, from Málaga to Malta, marking the 65th anniversary of Four Seasons.
Heritage Line (river): Heritage Line was founded in Saigon in August 2008 by John Tue Nguyen, and its first ship, Jayavarman, began sailing the Mekong in November 2009, with French-colonial and Khmer interiors, an Apsara Spa and the Club 1930 bar.
PONANT Explorations (expedition, yacht): PONANT sails a fleet of 12 French-flagged ships, from six 184-guest Explorer-class yachts and four 264-guest Boréal-class ships to its flagship, Le Commandant Charcot.
Something particular in mind